An electronic system having a set of circuit boards and an interconnect. Each of the set of circuit boards includes a set of fiber optic circuit board connectors. The interconnect includes (i) a first planar member, (ii) a second planar member that is substantially parallel to the first planar member, and (iii) a set of fiber optic cable assemblies. Each fiber optic cable assembly includes a fiber optic cable segment, a first fiber optic interconnect connector which fastens to one end of that fiber optic cable segment and a second fiber optic interconnect connector which fastens to another end of that fiber optic cable segment. Each fiber optic interconnect connector extends through a hole defined by one of the first and second planar members. Furthermore, each fiber optic interconnect connector is configured to engage with a fiber optic circuit board connector.
|
29. A fiber optic connector assembly, comprising:
a base portion that mounts to a circuit board; a connecting portion that is capable of moving relative to the base portion and engaging with a fiber optic connector, wherein the connecting portion has sides which taper toward each other in a trapezoidal manner; and a resilient portion disposed between the base portion and the connecting portion.
25. A fiber optic connector, comprising:
a cable receiving portion that receives a fiber of a segment of fiber optic cable; and a connecting portion that is capable of engaging with another fiber optic connector, wherein the connecting portion and the cable receiving portion form a unitary body that defines a set of detents for installing the fiber optic connector within a hole defined by a rigid planar member, and wherein the connecting portion defines sides which taper toward each other in a trapezoidal manner.
5. An interconnect, comprising:
a first planar member; a second planar member that is substantially parallel to the first planar member; and a set of fiber optic cable assemblies, each fiber optic cable assembly including a fiber optic cable segment, a first fiber optic connector which fastens to one end of that fiber optic cable segment and a second fiber optic connector which fastens to another end of that fiber optic cable segment, wherein each fiber optic connector extends through a holes defined by one of the first and second planar members, and wherein the first and second fiber optic connectors of each fiber optic cable assembly have sides which taper toward each other in a trapezoidal manner.
3. An interconnect, comprising:
a first planar member; a second planar member that is substantially parallel to the first planar member; and a set of fiber optic cable assemblies, each fiber optic cable assembly including a fiber optic cable segment, a first fiber optic connector which fastens to one end of that fiber optic cable segment and a second fiber optic connector which fastens to another end of that fiber optic cable segment, wherein each fiber optic connector extends through a hole defined by one of the first and second planar members, at least one-fiber optic connector extending through a hole defined in the first planar member and at least one fiber optic connector extending through a hole defined in the second planar member.
27. A fiber optic cable assembly, comprising:
a segment of fiber optic cable; a first fiber optic connector that fastens to one end of the segment of fiber optic cable; and a second fiber optic connector that fastens to another end of the segment of fiber optic cable, wherein each of the first and second fiber optic connectors includes: a cable receiving portion that receives a fiber of the segment of fiber optic cable, and a connecting portion that is capable of engaging with another fiber optic connector, wherein the connecting portion and the cable receiving portion form a unitary body that defines a set of detents for installing that fiber optic connector within a hole defined by a rigid planar member, and wherein the connecting portion defines sides which taper toward each other in a trapezoidal manner. 8. An interconnect, comprising:
a first planar member; a second planar member that is substantially parallel to the first planar member; a set of fiber optic cable assemblies, each fiber optic cable assembly including a fiber optic cable segment, a first fiber optic connector which fastens to one end of that fiber optic cable segment and a second fiber optic connector which fastens to another end of that fiber optic cable segment, wherein each fiber optic connector extends through a hole defined by one of the first and second planar members; and a vacuum injected medium disposed within an interconnect inner region defined by the first and second planar members, the vacuum injected medium holding the fiber optic cable segment and first and second fiber optic connectors of each fiber optic cable assembly of the set of fiber optic cable assemblies in place.
11. An interconnect, comprising:
a first planar member; a second planar member that is substantially parallel to the first planar member; a set of fiber optic cable assemblies, each fiber optic cable assembly including a fiber optic cable segment, a first fiber optic connector which fastens to one end of that fiber optic cable segment and a second fiber optic connector which fastens to another end of that fiber optic cable segment, wherein each fiber optic connector extends through a hole defined by one of the first and second planar members; and a fiber optic cable assembly having a first fiber optic connector, a second fiber.optic connector, a third fiber optic connector, a first fiber that extends between the first fiber optic connector and the second fiber optic connector, and a second fiber that extends between the first fiber optic connector and the third fiber optic connector.
14. A circuit board, comprising:
a section of circuit board material; a set of integrated circuits mounted to the section of circuit board material; a set of fiber optic transceivers mounted to the section of circuit board material, the set of fiber optic transceivers being in electrical communication with the set of integrated circuits; and a set of fiber optic connectors coupled to the set of fiber optic transceivers, wherein each fiber optic connector has (i) a base portion which is rigidly disposed relative to.the section of circuit board material, (ii) a connecting portion which is capable of moving relative to the section of circuit board material, and (iii) a resilient portion disposed between the base portion and the connecting portion of that fiber optic connector, wherein the connecting portion of each fiber optic connector has sides which taper toward each other in a trapezoidal manner.
10. An interconnect, comprising:
a first planar member; a second planar member that is substantially parallel to the first planar member; a set of fiber optic cable assemblies, each fiber optic cable assembly including a fiber optic cable segment, a first fiber optic connector which fastens to one end of that fiber optic cable segment and a second fiber optic connector which fastens to another end of that fiber optic cable segment, wherein each fiber optic connector extends through a hole defined by one of the first and second planar members; and a set of electrical conductors which extend along at least one of the first and second planar members, wherein the set of electrical conductors include: a first group of electrical conductors that extend along the first planar member; a second group of electrical conductors that extend along the second planar member; and a third group of electrical conductors that extend across the first and second planar members to connect the first and second groups of electrical conductors. 1. An electronic system, comprising:
a set of circuit boards, each of the set of circuit boards including a set of fiber optic circuit board connectors; and an interconnect having (i) a first planar member, (ii) a second planar member that is substantially parallel to the first planar member, and (iii) a set of fiber optic cable assemblies, each fiber optic cable assembly including a fiber optic cable segment, a first fiber optic interconnect connector which fastens to one end of that fiber optic cable segment and a second fiber optic interconnect connector which fastens to another end of that fiber optic cable segment; wherein each fiber optic interconnect connector extends through a hole defined by one of the first and second planar members, at least one fiber optic interconnect connector extending through a hole defined in the first.planar member, and at least one fiber optic interconnect connector extending through a hole defined in the second planar member; and wherein each fiber optic interconnect connector is configured to engage with a fiber optic circuit board connector.
17. A method for making an interconnect, the method comprising the steps of:
positioning a first planar member and a second planer member so that the first and second planar members (i) are adjacent to each other and (ii) reside in substantially the same plane; providing a set of fiber optic cable assemblies and installing the set of fiber optic cable assemblies into the first and second planar members, each fiber optic cable assembly including a fiber optic cable segment, a first fiber optic connector which fastens to one end of that fiber optic cable segment and a second fiber optic connector which fastens to another end of that fiber optic cable segment, the set of fiber optic cable assemblies being installed such that each fiber optic connector extends through a hole defined by one of the first and second planar members, wherein the step of providing and installing includes the step of: supplying the set of fiber optic cable assemblies such that the first and second fiber optic connectors of each fiber optic cable assembly have sides which taper toward each other in a trapezoidal manner; and after the step of providing and installing, folding the first and second planar members together so that the first and second planar members are substantially parallel to each other.
2. The electronic system of
a section of circuit board material; a set of integrated circuits mounted to the section of circuit board material; and a set of fiber optic transceivers mounted to the section of circuit board material and coupled to the set of fiber optic circuit board connectors, wherein the set of fiber optic transceivers are in electrical communication with the set of integrated circuits, and wherein each fiber optic circuit board connector has (i) a base portion which is rigidly disposed relative to the section of circuit board material, (ii) a connecting portion which is capable of moving relative to the section of circuit board material, and (iii) a resilient portion disposed between the base portion and the connecting portion of that fiber optic circuit board connector.
4. The interconnect of
6. The interconnect of
a set of standoffs which position the first and second planar members such that the first and second planar members are substantially parallel to each other.
7. The interconnect of
9. The interconnect of
a set of electrical conductors which extend along at least one of the first and second planar members.
12. The interconnect of
13. The interconnect of
15. The circuit board of
16. The circuit board of
18. The method of
supplying the set of fiber optic cable assemblies such that the fiber optic cable segment of each fiber optic cable assembly of the set of fiber optic cable assemblies has a same length.
19. The method of
arranging a set of standoffs between the first and second planar members such that the first and second planar members are substantially parallel to each other when the first and second planar members are folded together.
20. The method of
arranging the connecting portion and the standoff portion of each fiber optic connector such that the connecting portion of that fiber optic connector contacts one of the first and second planar members and the standoff portion of that fiber optic connector contacts the other of the first and second planar members when the first and second planar members are folded together.
21. The method of
vacuum injecting a medium into an interconnect inner region which is defined by the first and second planar members when the first and second planar members are folded together.
22. The method of
after the step of vacuum injecting, heating the medium to transition the medium from the liquid state to a solid state such that the medium holds the fiber optic cable segment and first and second fiber optic connectors of each fiber optic cable assembly of the set of fiber optic cable assemblies in place.
23. The method of
providing a set of electrical conductors which extend along at least one of the first and second planar members.
24. The method of
providing, as the first and second planar members, first and second rigid panels which include silicon-based material.
26. The fiber optic connector of
a standoff portion that extends from the cable receiving portion in a direction that is opposite the connecting portion such that, when the fiber optic connector is installed within the hole defined by the rigid planar member, the standoff portion is capable of supporting the rigid planar member relative to another rigid planar member.
28. The fiber optic cable assembly of
a standoff portion that extends from the cable receiving portion of that fiber optic connector in a direction that is opposite the connecting portion of that fiber optic connector such that, when that fiber optic connector is installed within a hole defined by the rigid planar member, the standoff portion is capable of supporting the rigid planar member relative to another rigid planar member.
30. The fiber optic connector assembly of
31. The fiber optic connector assembly of
a fiber optic transceiver having a transducer that is supported by the connecting portion and movable relative to the base portion.
32. The electronic system of
a first group of circuit boards which, when connecting to the interconnect, extends from the first planar member of the interconnect in a first direction; and a second group of circuit boards which, when connecting to the interconnect, extends from the second planar member of the interconnect in a second direction that is substantially opposite the first direction.
33. The interconnect of
34. The electronic system of
35. The interconnect of
|
A fiber optic cable assembly is a device that carries a light signal from one end to another. A typical fiber optic cable assembly includes a segment of fiber optic cable, a first fiber optic connector that connects to one end of the fiber optic cable segment, and a second fiber optic connector that connects to another end of the fiber optic cable segment. The fiber optic connectors of the fiber optic cable assembly typically connect with other fiber optic connectors or adaptors in a male/female configuration, or in a snap fit manner using sets of matching bumps and holes. Some fiber optic connectors further include alignment posts to ensure proper alignment of fiber ends.
Fiber optic cable assemblies are commonly used to connect data communications equipment.together, and are available in an assortment of standard lengths. For example, fiber optic cable assemblies having long lengths of fiber optic cable segments can be laid out to enable high-speed communications over extremely long distances, e.g., in a wide area network (WAN), in an oversees telephone network, etc. As another example, some fiber optic cable assemblies, which are typically not as long, can run along walls and ceilings of a building to connect computers together in a local area network (LAN). As yet another example, some fiber optic cable assemblies (called patch cords), which have relatively short fiber optic cable segments, can operate as jumper cables and plug into an exposed rack-mounted set of data communications devices called a patch panel in order to provide a centrally located set of connections in a switchboard-like manner. Such data communications devices typically have their own housings and provide sets of external ports into which a person (e.g., a network administrator) can manually plug the fiber optic connectors of the fiber optic cable assemblies. As such, the patch panel is typically located in a computer room or in a locked utility closet in order to prevent tampering and/or to protect against an unauthorized person inadvertently knocking a cable loose and re-plugging that cable into an incorrect port.
The fiber optic cable segments of some fiber optic cable assemblies have a thin single fiber, i.e., a single mode fiber, and are suited for carrying a single light signal. Others have a relatively larger single fiber, i.e., a multimode fiber, and are suited for concurrently carrying multiple light signals, each light signal having a slightly different reflection angle within the fiber. Some fiber optic cable segments have multiple fibers for carrying multiple light signals.
Some fiber optic cable assemblies have specially configured connectors or additional fittings (e.g., elbows or sheathings) that provide particular bend radii to the fiber optic cable segments over particular lengths (e.g., a 90 degree bend over a 1.5 inch span). Such connectors and fittings attempt to prevent the fiber optic cable segments from overbending, i.e., from being moved into a position that can result in excessive light energy loss and/or permanent disfiguration of the fiber.
Unfortunately, there are deficiencies to the above-described fiber optic connecting approaches. In particular, none of the above-described fiber optic connecting approaches are well-suited for connecting multiple electronic circuit boards together in a relatively small footprint (e.g., within a single electronic equipment cabinet) to enable the circuit boards to communicate with each other. Although patch cords are suitable for connecting rack-mounted patch panel data communications devices together, patch cords alone are not well-suited for connecting circuit boards together. For example, a typical circuit board can exchange over a hundred signals with an external device (e.g., typically through a backplane that carries electrical signals). This quantity of signals makes the job of manually connecting fiber optic cables between several circuit boards an arduous and almost impractical task. Additionally, the resulting set of installed cable assemblies, which can quickly look like an overwhelming tangled web of cables, would tend to block air flow around the circuit boards thus preventing the circuit boards from receiving adequate cooling. Furthermore, replacement of a circuit board would become an extremely time consuming and tedious endeavor since fiber optic cable assemblies would need to be accurately and delicately removed from the old circuit board and plugged into the new circuit board. Moreover, even if a person were to achieve plugging in fiber optic cable assemblies to tie all the circuit boards together, there is a lack of control over who can later access and change/move the fiber optic cable assemblies, which is handled today for patch panels by locating the patch panels in a computer room or closet with restricted access.
In contrast to the above-described conventional fiber optic connecting approaches, an embodiment of the invention is directed to techniques for connecting circuit boards together using an interconnect which includes two planar members and a set of fiber optic cable assemblies having fiber optic connectors which extend through holes in the planar members. Accordingly, the circuit boards can engage with the interconnect (and thus communicate with each other through the interconnect) in a manner that enables them to easily install onto and de-install from the interconnect (e.g., during replacement). Additionally, the fiber optic cable assemblies can be positioned relative to the planar members such that there is no interference with an air flow that cools the circuit boards, and no opportunity for tampering or inadvertently modifying the interconnect.
One arrangement of the invention is directed to an electronic system having a set of circuit boards and an interconnect. Each of the set of circuit boards includes a set of fiber optic circuit board connectors. The interconnect includes (i) a first planar member, (ii) a second planar member that is substantially parallel to the first planar member, and (iii) a set of fiber optic cable assemblies. Each fiber optic cable assembly includes a fiber optic cable segment, a first fiber optic interconnect connector which fastens to one end of that fiber optic cable segment and a second fiber optic interconnect connector which fastens to another end of that fiber optic cable segment. Each fiber optic interconnect connector extends through a hole defined by one of the first and second planar members. Furthermore, each fiber optic interconnect connector is configured to engage with a fiber optic circuit board connector. This arrangement provides a well-organized and controlled configuration of fiber optic pathways between circuit boards.
In one arrangement, each of the set of circuit boards further includes a section of circuit board material, a set of integrated circuits mounted to the section of circuit board material, and a set of fiber optic transceivers mounted to the section of circuit board material and coupled to the set of fiber optic circuit board connectors. The set of fiber optic transceivers are in electrical communication with the set of integrated circuits. Additionally, each fiber optic circuit board connector has (i) a base portion which is rigidly disposed relative to the section of circuit board material, (ii) a connecting portion which is capable of moving relative to the section of circuit board material, and (iii) a resilient portion disposed between the base portion and the connecting portion of that fiber optic circuit board connector.
In one arrangement, the fiber optic cable segment of each fiber optic cable assembly of the set of fiber optic cable assemblies has a same length. Accordingly, the fiber optic signals passing through the set of fiber optic cable assemblies are single mode signals, the signals will essentially have the same delays.
In one arrangement, the first and second fiber optic interconnect connectors of each fiber optic cable assembly have sides which taper toward each other in a trapezoidal manner. Preferably, interconnect connectors have tapering sides on all four sides rather than just two sides. Accordingly, the circuit board connectors self-align with their corresponding interconnect connectors.
In one arrangement, interconnect further includes a set of standoffs which position the first and second planar members such that the first and second planar members are substantially parallel to each other. The standoffs facilitate positioning of the planar members relative to each other, and prevent the planar members from moving too close to each other where they could otherwise squish and damage the fiber optic cable segments. In another arrangement, each fiber optic interconnect connector defines a connecting portion and a standoff portion such that the connecting portion of that fiber optic interconnect connector contacts one of the first and second planar members and the standoff portion of that fiber optic interconnect connector contacts the other of the first and second planar members.
In one arrangement, the interconnect further includes a vacuum injected medium disposed within an interconnect inner region defined by the first and second planar members. The vacuum injected medium holds the fiber optic cable segment and first and second fiber optic connectors of each fiber optic cable assembly of the set of fiber optic cable assemblies in place. Preferably, the vacuum injected medium prevents tampering or manipulating of the fiber optic cable assemblies.
In one arrangement, the interconnect further includes a set of electrical conductors which extend along at least one of the first and second planar members. Accordingly, the interconnect can be used for providing electrical signals (e.g., power supply signals, circuit board presence indicator signals, etc.) to the circuit boards in addition to fiber optic signals.
The features of the invention, as described above, may be employed in electronic systems, devices and procedures as well as other components such as those of EMC Corporation of Hopkinton, Mass.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings in which like reference characters refer to the same parts throughout the different views. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
Embodiments of the invention are directed to techniques for connecting circuit boards together using an interconnect that provides fiber optic pathways. The interconnect (e.g., a fiber optic backplane) includes two planar members and a set of fiber optic cable assemblies having fiber optic connectors which extend through holes in the planar members. Accordingly, the circuit boards can connect with and communicate with each other through the interconnect in a manner that enables them to easily install onto and de-install from the interconnect (e.g., during initial installation, replacement, etc.). Additionally, the fiber optic cable assemblies can be positioned relative to the planar members such that there is no interference with an air stream that cools the circuit boards, and such that there is little or no opportunity for tampering or inadvertently modifying the configuration of fiber optic pathways. Furthermore, such positioning of the cable assemblies avoids the opportunity for cables to get damaged or caught on something.
The interconnect 22 provides fiber optic pathways between the set of circuit boards 24 thus enabling the circuit boards 24 to communicate with each other using fiber optic signals. That is, the fiber optics signals exchanged between different circuit boards 24 pass through fibers housed within the interconnect 22. Accordingly, the fiber optic pathways between the circuit boards 24 are enclosed and protected to prevent tampering or inadvertent changing. Additionally, the pathways are protected against damage (e.g., the cables will not have an opportunity to get caught on something). Furthermore, the fibers do not interfere with air flow pathways 36 between the circuit boards 24 thus permitting an air stream to adequately pass between the circuit boards 24 and remove heat.
It should be understood that the interconnect 22 provides a well-arranged structure of many fiber optic pathways (e.g., 128 fiber optic connectors). The user of the backplane does not need to plug-in any individual cables or be overwhelmed with sorting out a maze of cables. Rather, the user can simply engage and disengage circuit boards 24 with the interconnect 22 in a traditional manner (e.g., sliding circuit boards in and out of a card cage). Further details of the invention will now be provided with reference to FIG. 2.
The fiber optic cable assemblies 44 install into the planar members 42 such that the fiber optic interconnect connectors 28 face outward (i.e., reside on an outer surface of the planar members 42) and such that the fiber optic cable segments 46 reside between the planar members 42 (i.e., reside in an interconnect inner region defined by the inner surfaces of the planar members 42). Accordingly, only the ends of the fiber optic interconnect connectors 28 are exposed, and none of the fiber optic cable segments 46 are exposed.
Some fiber optic cable assemblies 44 install into a single planar member 42. For example, fiber optic interconnect connectors 28-Al, 28-A2 of a fiber optic cable assembly 44-A install through holes defined only by the planar member 42-A such that a fiber optic cable segment 46-A of the fiber optic cable assembly 44-A (shown as a dashed line because the fiber optic cable segment 46-A is on the other side of the planar member 42-A) resides between the planar members 42.
In contrast, some fiber optic cable assemblies 44 install between both planar members 42. For example, a fiber optic interconnect connector 28-B1 of a fiber optic cable assembly 44-B installs through a hole defined by the planar member 42-A and a fiber optic interconnect connector 28-B2 of the fiber optic cable assembly 44-B installs through a hole defined by the planar member 42-B. Additionally, a fiber optic cable segment 46-B of the fiber optic cable assembly 44-B (shown partially as a dashed line because part of the fiber optic cable segment 46-B is hidden by the planar member 42-A) resides between the planar members 42.
Although only two fiber optic cable assemblies 44 are shown in
Optionally, the interconnect 22 further includes a set of electrical conductors 48 which extend along one or both of the planar members 42. For example, as shown in
The electrical conductors 48 enable electrical signals to travel through the interconnect 22 to the circuit boards 24. For example, electrical conductors 48 can carry power supply signals to provide power to the circuit boards 24. As another example, the electrical conductors 48 can carry presence signals exchanged between the circuit boards 24 in order for the circuit boards 24 to indicate their presence, or absence, to each other thus allowing the circuit boards 24 to understand when and when not to send fiber optic signals through the interconnect 22. Preventing circuit boards from transmitting fiber optic signals through fiber optic cable assemblies 44 which are not terminated at the other end (e.g., by another circuit board 24) would otherwise run the risk of injuring a bystander with the fiber optic signals.
It should be understood that the use of fiber optic cable assemblies 44 within the interconnect 22 enables the assemblies 44 to be pre-qualified (i.e., tested and screened ahead) of installation with the interconnect 22. In one arrangement, the assemblies 44 are pre-tested, pre-tensioned, etc. prior to their installation within the planar members 42-A, 42-B. Further details of the invention will now be provided with reference to FIG. 3.
As shown in
By way of example only, the connector 28 is configured as a female connector and defines a cavity 74 into which a fiber optic circuit board connector 32 (when configured as a male) can engage. Preferably, sides 76 of the connecting portion 66 are tapered to enable the fiber optic circuit board connector 32 (also preferably tapered) to self-align within the connector cavity 74 to provide proper alignment of fiber ends. In one arrangement, the connector 28 defines four engagement sides 76 and two of the four engagement sides 76 are tapered for self-alignment along a single axis (e.g., the X-axis). In another arrangement, all of the four engagement sides 76 are tapered for self-alignment along multiple axes (e.g., the X and Y axes).
Optionally, the fiber optic interconnect connector 28 further includes a bending member 78 (e.g., an elbow, a sleeve, a sheathing, a fitting, etc.) that provides a particular bend radius to the fiber optic cable segment 46 over a particular length. In one arrangement, the bending member 78 provides a 90 degree bend radius over a length of 0.5 inches.
Additionally, the interconnect 22 optionally further includes a set of standoff members 80 (e.g., see standoff members 80-A, 80-B). Each standoff member 80 (e.g., standoff member 80-A) includes a mid portion 82 (e.g., mid portion 82-A), a first end 84 (e.g., end 84-A) which inserts through a hole 64 (e.g., hole 64-A) defined by a planar member 42 (e.g., planar member 42-A) and a second end 86 (e.g., end 86-A) which contacts the other planar member 42 (e.g., planar member 42-B). The set of standoff members 80 facilitate positioning of the two planar members 42 relative to each other and prevent the distance between the two planar members 42 from becoming so small that the fiber optic cable segments are crushed or damaged. Further details of the invention will now be provided with reference to FIG. 4.
It should be understood that the bending member 78 of the portion 60 of
Optionally, the circuit board 24 further includes an electrical connector 107 that connects to the conductive material 101 in order to enable the circuit board 24 to send out and receive external electrical signals. In one arrangement, the electrical connector 107 connects to the electrical conductors 48 residing on the interconnect 22 (also see FIG. 2).
The circuit board 24 further includes a set of handles 108-1, 108-2 which a user (e.g., a technician) actuates when installing the circuit board 24 onto the interconnect 22. Preferably, the user moves the handles 108-1, 108-2 simultaneously so that they grab a frame (not shown), e.g., a card cage, which is in a fixed position relative to the interconnect 22. The handles 108-1, 108-2 are preferably configured to move the circuit board 24 into a fixed position relative to the interconnect 22 so that the fiber optic circuit board connectors 32 engage with the fiber optic interconnect connectors 28, 28' of the interconnect 22. Preferably, the user can move the handles 108-1, 108-2 in the opposite direction to remove the circuit board 24 from the interconnect 22.
It should be understood that the interconnect 22 enables the circuit boards 24 to engage and disengage conveniently and in a well-organized manner. That is, the arrangement of the circuit boards 24 and the interconnect 22 allow the circuit boards 24 to easily install onto and de-install from the interconnect (e.g., during replacement). Additionally, the fiber optic cable assemblies 44 within the interconnect 22 can be positioned relative to the planar members 42 such that there is no interference with an air flow 36 (see
The fiber optic connector assembly 110 further includes a base portion 116 that mounts to the section of circuit board material 90, a connecting portion 118 which forms the fiber optic circuit board connector 32, and a resilient member 120 that is disposed between the base portion 116 and the connecting portion 18. The connecting portion 118 of the fiber optic connector assembly 109 forms the fiber optic circuit board connector 32 of
The fiber optic connector assembly 110 further includes a fiber 126 that extends from the transducer 114 to the connecting portion 118. The end 128 of the fiber 126 aligns with a corresponding fiber end of a fiber optic interconnect connector 28 when the circuit board 24 properly engages with the interconnect 22. Preferably, the connecting portion 118 defines tapered sides 130 that facilitate alignment of the connecting portion 118 within a cavity 74 defined by the fiber optic interconnect connector 28, 28' (also see FIGS. 3 and 4). In one arrangement, the connecting portion 118 has four sides, and each of the four sides is tapered for facilitated alignment in multiple directions (the Y and Z directions). In another arrangement, the connecting portion 118 has four sides but only two of the four sides are tapered for facilitated alignment along a single axis.
It should be understood that the connecting portion 118 is movable relative to the base portion 116. In particular, the holes 121 are sized such that the base portion 116 provides support for the connecting portion 118, but allows the connecting portion to move along a plane 132 for proper alignment with a corresponding fiber optic interconnect connector 28. The plane 132 (i.e., the Y-Z plane) is substantially perpendicular to the plane 134 of the section of circuit board material 90 (i.e., the X-Z plane). Furthermore, the resilient member 120, which is shown by way of example only as a coiled spring in
It should be understood that the distance between the tabs 70 and the cable receiving portion 68 is such that the connecting portion 66 properly passes through a hole 62 in a planar member 42 (also see FIG. 4), and such that the tabs re-extend to lock the fiber optic interconnect connector 28' into the hole 62. It is acceptable that the tabs 70 and the cable receiving portion 68 not be perfectly distanced to enable a tight lock within the hole 62 of the planar member 42 (e.g., the planar member 42-A) since the standoff portions 92-A, 92-B of the connector 28' will contact the other planar member 42 (e.g., the planar member 42-B) and push the connecting portion 66 as far as it can go into the first planar member (e.g., the planar member 42-A). Further details of the invention will now be provided with reference to
In step 144, the manufacturer provides a set of fiber optic cable assemblies and installs the set of fiber optic cable assemblies into the first and second planar members through holes defined in the first and second planar members. As shown in
Preferably, automated machinery installs the fiber optic cable assemblies 44 into the planar members 42. The user of automated machinery minimizes the opportunity for error and enables consistent manufacturing of interconnects 22 from one interconnect to another. Furthermore, automated machinery can be programmed to lay out any slack in the fiber optic cable segments 46 of the fiber optic cable assemblies 44 (also see
In step 146, the manufacturer arranges a set of standoff members 78 on at least one of the first and second planar members 42 (also see FIG. 3). Such standoff members 78 preferably insert into holes in one planar member 42 and contact the inner surface of the other planar member 42 in order to proper position the planar members 42 relative to each other and to prevent the planar members 42 from coming too close to each other where they could compress and damage the fiber optic cable segments 46 of the fiber optic cable assemblies 44. Step 145 may be unnecessary if the fiber optic interconnect connectors 28 include standoff portions 92-A, 92-B (also see FIG. 4).
In step 148, the planar members 42 are folded together such that they are substantially parallel to each other. This creates a double-sided fiber optic backplane, i.e., a rigid interconnect that can engage with circuit boards on both sides.
In step 150, the manufacturer vacuum injects a medium into an interconnect inner region defined by the first and second planar members.
In step 152, the medium is heated to solidify the medium. In particular, as shown in
After the medium solidifies, the structure is now the interconnect 22 (also see FIG. 1). The manufacturer can perform additional processing steps if desired. For example, if needed, the manufacturer can shave or polish off any excess portions of the medium, and add a protective coating to the interconnect 22 (e.g., if the medium is a material other than epoxy). As another example, the manufacturer can drill mounting holes into and/or mount fittings (e.g., mounting studs) to the interconnect 22.
When the procedure 140 is complete, the interconnect 22 is preferably extremely rigid due to the rigid properties of the planar members 42-A, 42-B which operate as a stress skin exterior to the interconnect. Preferably, the medium, in its solid state, is light weight in order to facilitate transportation of the interconnect 22 and so as not to require special structural supports or frames when installing the interconnect within an electronic cabinet.
It should be understood that the vacuum source 174 and the medium source 172 are shown as being on opposite sides of the planar members 42-A, 42-B by way of example only. In other arrangements, the vacuum source 174 and the medium source 172 are on the same side of the planar members 42-A, 42-B. In one arrangement, the vacuum source 174 and the medium source 172 use the same nozzle or nozzles. Further details of the invention will now be provided with reference to FIG. 12.
Preferably, the pair of opposite sides 192-A, 192-B taper toward each other in a trapezoidal manner. Similarly, the pair of opposite sides 194-A, 194-B taper toward each other in a trapezoidal manner as well. Accordingly, when the cavity 74 of the fiber optic interconnect connector 28 has a similar but complementing shape (see FIG. 7), the end 190 self-aligns with the fiber optic interconnect connector 28 to form a fiber optic connection. In another arrangement, only one pair of sides is tapered. In another arrangement, none of the pairs of sides is tapered.
Preferably, the end 200 of
It should be understood that the fiber are shown in
The connecting portion 118 of
Nevertheless, it should be understood that the connecting portion 234 of
The fiber optic cable assembly of
As described above, embodiments of the invention are directed to techniques for connecting circuit boards 24 together using an interconnect 22 that provides fiber optic pathways. The interconnect 22, e.g., a fiber optic backplane, includes two planar members 42-A, 42-B and a set of fiber optic cable assemblies 44 having fiber optic connectors 28, 28' which extend through holes 62 in the planar members 42-A, 42-B. Accordingly, the circuit boards 24 can connect with the interconnect 22 (in order to communicate with each other through the interconnect 22) in a manner that enables them to easily install onto and de-install from the interconnect 22 (e.g., during initial installation, replacement, etc.). Additionally, the fiber optic cable assemblies 44 can be positioned relative to the planar members 42-A, 42-B such that there is no interference with an air stream 36 that cools the circuit boards 24, and such that there is little or no opportunity for tampering or inadvertently modifying the configuration of fiber optic pathways. The features of the invention may be employed in computer systems systems, components and methods as well as other devices and processes such as those of EMC Corporation of Hopkinton, Mass.
While this invention has been particularly shown and described with references to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
For example, it should be understood that the fiber optic interconnect connectors 28, 28' were described above as being female fiber optic connectors, and that the fiber optic circuit board connectors 32, 32' were described above as being male fiber optic connectors by way of example only. Other arrangements are suitable as well. For example, the connecting portions 118, 234 of the fiber optic circuit board connectors 32, 32' can be configured as female connectors (i.e., configured to define a cavity similar to the cavity 74 of the fiber optic interconnect connector 28, 28' of FIG. 7), and the fiber optic interconnect connectors 28, 28' can be configured to as male connectors (e.g., to have ends such as those shown in
Additionally, it should be understood that some of the steps of manufacturing the interconnect 22 are optional. For example, in connection with the procedure 140 of
Furthermore, it should be understood that the step of heating is optional (see step 152 of FIG. 8). If the medium is quick to change state (e.g., quick drying, quick setting, etc.), the use of heaters 176-A, 176-B can be avoided. In some arrangements, metal plates are used rather than the heaters 176-A, 176-B. The metal plates provide clamp pressure to offset pressure from the injected medium (e.g., pressure from expanding foam). The metal plates support the planar members 42 and keep them flat during the medium installation process.
Additionally, it should be understood that the medium can be positioned between the planar members 42-A, 42-B using techniques other than vacuum injecting. For example, if the medium initially has a low viscosity, the interconnect inner region 178 (see
Furthermore, it should be understood that the connecting portions 118, 234 were described as being either trapezoidal or conical in shape by way of example only. Other shapes are suitable for use as well provided that the connector on the opposite end has a cavity with a complementary shape. Such alternative shapes include spherical shapes (e.g., one connector being concave, the other being convex), rectangular in shape, square in shape, etc.
Additionally, it should be understood that the fiber optic cable assemblies 44 were described above as having substantially the same length in order to provide the same signal delay. In another arrangement, the fiber optic cable assemblies 44 have different lengths. However, fiber optic cable assemblies 44 carrying the same types of signals (e.g., data in a bus-like manner, commands, etc.) preferably have similar lengths so that the light signals behave similarly, i.e., so that the variation in delay is minimal, so that there is similar light signal energy loss, so that there is similar reflection, and so on.
Furthermore, it should be understood that the fiber optic connectors 28, 32 can be self-aligning, as well as require alignment assistance. Suitable mechanisms for providing such alignment assistance include using alignment posts and rigid guides (e.g., guide pins).
Additionally, it should be understood that the fibers described above can be suitable for single mode or multimode transmissions. The fibers can be configured to carry multiple wavelengths of light simultaneously (e.g., 16 slightly different wavelengths of blue light, LED light, laser light, etc.). The receiving ends can then be configured to filter out the wavelengths and identified particular light signals within the fiber.
Furthermore, it should be understood that the interconnect 22 is suitable for use in an electronic cabinet (e.g., in a general purpose computer, in a data storage system, in a specialized computer, etc.). The interconnect 22 is also suitable for use in an exposed area such as in a rack-mount configuration. Even in an exposed area, the organization of fiber optic cable assemblies 44 stored in the interconnect 22 cannot be varied or tampered with.
Additionally, it should be understood that the planar members 42 of the interconnect 22 were shown as including six columns 26 of connectors 28, 28' by way of example only. Other numbers of columns are suitable for use as well, e.g., four, eight, 12, 16 and so on.
Furthermore, it should be understood that the planar members 42 of the interconnect 22 were shown as including five fiber optic connectors 28, 28' in each column 26 by way of example only. Other numbers of connectors 28, 28' can reside in each column 26, e.g., 12, 16, 32, 64, etc.
Additionally, it should be understood that the interconnect 22 was above described as including fiber optic cable assemblies 44 having exactly two ends (see
Furthermore, it should be understood that the interconnect 22 can include standard fiber optic connectors which connect to external devices. For example, some of the fiber optic cable assemblies 44, 250 can have a standard fiber optic connector at one end, and that connector can reside along a periphery of the interconnect 22 to enable the external device to connect thereto. Accordingly, external devices can directly access signals within the interconnect 22 (e.g., for testing and debugging purposes, for diagnostics, etc). In one arrangement, such peripherally located fiber optic connectors enable expansion of the interconnect 22 so that it can join with one or more other interconnects 22, systems or networks.
Additionally, it should be understood that the layout of the circuit board 24 in
Furthermore, it should be understood that electrical conductors can be included in the interconnect 22. For example, etch can be installed on and/or within the planar members 42 using standard circuit board manufacturing techniques. Such electrical conductors can connect with the circuit boards 24 using standard electrical connectors. Additionally, such electrical conductors can connect across the two planar members 42 via a flexible set of electrical conductors (e.g., wires, flex cable, etc.) in a manner similar to the segment of fiber optic cable 46-B of FIG. 2.
Additionally, it should be understood that the medium between the planar members 42-A, 42-B is not necessary. In some arrangements, the interconnect inner region 178 (see
Furthermore, it should be understood that the interconnect 22 was described above as being double-sided by way of example only. In some arrangements, the interconnect 22 is not double-sided, i.e., does not have fiber optic connectors 28, 28' on both sides. Rather, in some arrangements, the interconnect 22 is single-sided. That is, in the other arrangements, the interconnect 22 has fiber optic connectors 28, 28' only on one side (i.e., on one planar member 42). Therefore, the invention should be limited only by the spirit and scope of the appended claims.
Patent | Priority | Assignee | Title |
10345536, | Jan 06 2015 | COMMSCOPE TELECOMMUNICATIONS SHANGHAI CO LTD | Optical fiber connector and method of attaching and detaching same |
10866372, | Jan 06 2015 | CommScope Telecommunications (Shanghai) Co. Ltd. | Optical fiber connector and method of attaching and detaching same |
11276955, | Jan 06 2020 | Ciena Corporation | Double-blind mating pluggable-modules holder |
6839476, | Dec 10 2002 | Samsung Electro-Mechanics Co., Ltd. | Multi-layer printed circuit board and the method for coupling optical signals between layers of multi-layer printed circuit board |
6934152, | Jun 27 2003 | EMC IP HOLDING COMPANY LLC | Systems and methods for connecting an electronic apparatus to a backplane |
7062132, | Dec 23 2003 | RPX Corporation | Coupler assembly for an optical backplane system |
7102893, | Sep 29 2003 | EMC IP HOLDING COMPANY LLC | Methods and apparatus for forming a cohesive backplane interconnect system |
7252439, | Feb 03 2004 | Fujitsu Limited | Blade-type optical transmission apparatus |
7310474, | Nov 29 2002 | Fujitsu Limited | Unit installed in electronic equipment and connection mechanism of transmission line of the electronic equipment |
7364366, | Feb 02 2005 | TTM TECHNOLOGIES, INC | Circuit board assembly having a guide insert |
7370134, | Mar 25 2004 | Round Rock Research, LLC | System and method for memory hub-based expansion bus |
7382639, | Aug 02 2002 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | System and method for optically interconnecting memory devices |
7392331, | Aug 31 2004 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | System and method for transmitting data packets in a computer system having a memory hub architecture |
7486847, | Mar 31 2008 | International Business Machines Corporation | Chip carrier package with optical vias |
7489875, | Aug 09 2002 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | System and method for multiple bit optical data transmission in memory systems |
7546435, | Feb 05 2004 | Round Rock Research, LLC | Dynamic command and/or address mirroring system and method for memory modules |
7557601, | Jun 11 2003 | Round Rock Research, LLC | Memory module and method having improved signal routing topology |
7596641, | Aug 31 2004 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | System and method for transmitting data packets in a computer system having a memory hub architecture |
7596675, | Mar 08 2004 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | Memory hub architecture having programmable lane widths |
7746095, | Jun 11 2003 | Round Rock Research, LLC | Memory module and method having improved signal routing topology |
7805586, | Aug 29 2002 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | System and method for optimizing interconnections of memory devices in a multichip module |
7836252, | Aug 29 2002 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | System and method for optimizing interconnections of memory devices in a multichip module |
7899969, | Mar 25 2004 | Round Rock Research, LLC | System and method for memory hub-based expansion bus |
7949803, | Aug 31 2004 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | System and method for transmitting data packets in a computer system having a memory hub architecture |
8015384, | Mar 08 2004 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | Memory hub architecture having programmable lane widths |
8019924, | Mar 25 2004 | Round Rock Research, LLC | System and method for memory hub-based expansion bus |
8117371, | Mar 25 2004 | Round Rock Research, LLC | System and method for memory hub-based expansion bus |
8179676, | Jul 21 2010 | TELEFONAKTIEBOLAGET L M ERICSSON PUBL | Optical interconnects in cooling substrates |
8190819, | Aug 29 2002 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | System and method for optimizing interconnections of memory devices in a multichip module |
8229266, | Oct 26 2004 | Tyco Electronics Raychem NV | Optical signal distribution assembly with optical connector holder |
8235604, | Mar 30 2009 | Hitachi Cable, Ltd. | Optical connector and fiber module |
8322933, | Oct 06 2005 | NEC Corporation | Optical connection structure between optical backplane and circuit substrate |
8346998, | Aug 31 2004 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | System and method for transmitting data packets in a computer system having a memory hub architecture |
8417071, | May 24 2010 | Xyratex Technology Limited | Data storage system, a modular printed circuit board, a backplane and a backplane component |
8438329, | Apr 08 2004 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | System and method for optimizing interconnections of components in a multichip memory module |
8565570, | Jul 22 2010 | TELEFONAKTIEBOLAGET L M ERICSSON PUBL | Optical backplane |
8589643, | Oct 20 2003 | Round Rock Research, LLC | Arbitration system and method for memory responses in a hub-based memory system |
8775764, | Mar 08 2004 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | Memory hub architecture having programmable lane widths |
9057854, | Nov 05 2009 | LG INNOTEK CO , LTD | Optical printed circuit board and method of manufacturing the same |
9164250, | Mar 14 2012 | VALTRUS INNOVATIONS LIMITED | Replaceable modular optical connection assembly |
9213157, | Jan 06 2012 | Hewlett Packard Enterprise Development LP | Connector modules to optically connect to electronic devices |
9217832, | Jan 06 2012 | Hewlett Packard Enterprise Development LP | Connector modules having optical connectors moveable between a retracted position and an extended position |
9274991, | Nov 01 2004 | U S BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT | Memory hub architecture having programmable lane widths |
9477050, | Jan 06 2012 | Hewlett Packard Enterprise Development LP | Connector modules having optical connectors moveable between a retracted position and an extended position |
9582450, | Mar 30 2011 | Fujitsu Limited | Rack, server and assembly comprising such a rack and at least one server |
9645328, | Oct 29 2014 | RUSNANO JOINT STOCK COMPANY | No-polish optical element attachment for optical fiber ferrule |
9645337, | Jan 06 2012 | Hewlett Packard Enterprise Development LP | Connector modules to optically connect to electronic devices |
9651744, | Oct 29 2014 | RUSNANO JOINT STOCK COMPANY | Multi-fiber ferrule |
Patent | Priority | Assignee | Title |
4158476, | Dec 16 1977 | ITT Corporation | Single optical fiber connector |
4258977, | Jun 05 1978 | Northern Telecom Limited | Optical fibre connector |
4613105, | Feb 02 1984 | FONDATION SUISSE POUR LA RECHERCHE EN MICROTECHNIQUE A CORP OF SWITZERLAND | Device for aligning optical components |
4904036, | Mar 03 1988 | American Telephone and Telegraph Company, AT&T Bell Laboratories; BELL TELEPHONE LABORATORIES, INCORPORATED, A CORP OF NY ; AMRICAN TELEPHONE AND TELEGRAPH COMPANY, A CORP OF NY | Subassemblies for optoelectronic hybrid integrated circuits |
5073000, | May 21 1990 | Motorola, Inc. | Optical interconnect printed circuit structure |
5082344, | Mar 09 1990 | AMP Incorporated | Adapter assembly with improved receptacle for a push-pull coupling type of optical fiber connector |
5123073, | May 31 1991 | COMMSCOPE, INC OF NORTH CAROLINA | Precision optical fiber connector |
5204925, | Sep 11 1991 | FURUKAWA ELECTRIC NORTH AMERICA, INC | Optical interconnection of circuit packs |
5257332, | Sep 04 1992 | AT&T Bell Laboratories | Optical fiber expanded beam coupler |
5283851, | Oct 08 1991 | Thomson-CSF | Optical interconnection strip |
5394503, | Oct 08 1993 | McData Services Corporation | Optical fiber connection monitoring apparatus, patch panel control system and method of using same |
5425831, | Mar 18 1994 | AT&T IPM Corp | Optical fiber connecting method |
5513293, | Nov 29 1994 | AT&T Corp.; AT&T Corp | Optical backplane for a telecommunication distribution frame |
5598494, | Oct 23 1995 | The United States of America as represented by the Secretary of the Army | Multi-channel fiber optic connector |
5778123, | Mar 12 1996 | Minnesota Mining and Manufacturing Company | Alignment assembly for multifiber or single fiber optical cable connector |
5838856, | Oct 31 1995 | Mercury Corporation | Optical-fiber cable connector assembly |
5845028, | Mar 12 1996 | Minnesota Mining and Manufacturing Company | Alignment assembly for multifiber or single fiber optical cable connector |
5920670, | Jun 07 1996 | 3M Innovative Properties Company | Multiple alignment connector ferrule |
6005991, | Nov 26 1997 | US Conec Ltd | Printed circuit board assembly having a flexible optical circuit and associated fabrication method |
6041652, | Jul 31 1998 | Northrop Grumman Systems Corporation | Multisensor rotor flexure mounting |
6233376, | May 18 1999 | The United States of America as represented by the Secretary of the Navy | Embedded fiber optic circuit boards and integrated circuits |
6259840, | Mar 31 1999 | International Business Machines Corporation | Printed circuit board having fluid-linked optical pathways for coupling surface mounted optoelectric semiconductor devices |
6270262, | Nov 10 1999 | Harris Corporation | Optical interconnect module |
6304690, | Apr 02 1998 | Lumentum Technology UK Limited | Connecting a plurality of circuit boards |
6305848, | Jun 19 2000 | SUMITOMO ELECTRIC DEVICE INNOVATIONS, U S A , INC | High density optoelectronic transceiver module |
6419399, | Dec 01 1999 | 3M Innovative Properties Company | Optical fiber connector system |
EP813083, | |||
WO9913367, |
Date | Maintenance Fee Events |
Mar 23 2007 | M1551: Payment of Maintenance Fee, 4th Year, Large Entity. |
Mar 23 2011 | M1552: Payment of Maintenance Fee, 8th Year, Large Entity. |
Aug 04 2011 | ASPN: Payor Number Assigned. |
Mar 23 2015 | M1553: Payment of Maintenance Fee, 12th Year, Large Entity. |
Date | Maintenance Schedule |
Sep 23 2006 | 4 years fee payment window open |
Mar 23 2007 | 6 months grace period start (w surcharge) |
Sep 23 2007 | patent expiry (for year 4) |
Sep 23 2009 | 2 years to revive unintentionally abandoned end. (for year 4) |
Sep 23 2010 | 8 years fee payment window open |
Mar 23 2011 | 6 months grace period start (w surcharge) |
Sep 23 2011 | patent expiry (for year 8) |
Sep 23 2013 | 2 years to revive unintentionally abandoned end. (for year 8) |
Sep 23 2014 | 12 years fee payment window open |
Mar 23 2015 | 6 months grace period start (w surcharge) |
Sep 23 2015 | patent expiry (for year 12) |
Sep 23 2017 | 2 years to revive unintentionally abandoned end. (for year 12) |